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Old 12-19-2010, 04:57 PM   post #1 of 20
SnowMower
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Default How do I test the fuel shut off solenoid?

Hi guys, how do I actually test the solenoid itself?
I have confirmed I have power where the solenoid plugs into the harness connector.

So, I will remove the solenoid.

1) Do I need to ground the solenoid for it to actuate?
2) And is there a particular part of the solenoid I need to ground in order to make it actuate. Any particular part I should NOT ground for fear of electricuting myself or ruining the part?

Thanks
Snowmower

Oh ya, this is on a 25hp Kohler in a craftman GT5000.
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Old 12-19-2010, 06:15 PM   post #2 of 20
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Default Re: How do I test the fuel shut off solenoid?

After you remove the actuator, see if it moves freely by hand. If not, replace it. If it is free, plug it back in, turn the key on, and I would try to touch some type of ground where the "nut" part of the actuator is. I would try not to touch ground where the threads are on the actuator as not to cause a pit on the threads by arcing to ground. Don't touch the power side of the actuator. It is like a miniture coil and may give you a small jolt when you remove it from ground or pull the power away. Good luck in your venture.
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Old 12-19-2010, 08:17 PM   post #3 of 20
38racing
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Default Re: How do I test the fuel shut off solenoid?

you can test with a 9volt battery. Positive to the positive lead and negative to the body or negative lead (if there is one)
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Old 12-19-2010, 11:25 PM   post #4 of 20
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Default Re: How do I test the fuel shut off solenoid?

Make sure you have rinsed all the gasoline out of the thing before you test it. A little spark might cause a surprise.
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Old 12-20-2010, 08:53 AM   post #5 of 20
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Default Re: How do I test the fuel shut off solenoid?

Thanks guys. So if I read this right, the threaded part of the solenoid is what i need to ground.
Appreciate the help. Will give it a try next weekend once all of the Christmas hubbub comes to an end.

Bill
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Old 12-20-2010, 10:39 AM   post #6 of 20
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Default Re: How do I test the fuel shut off solenoid?

You should be able to hear it when you turn the ignition on..It will click showing you that your solenoid is working...Possible some crud in your float bowl plugging the main jet which the solenoid closes on at shut down.
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Old 12-20-2010, 11:11 AM   post #7 of 20
Walt 2002
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Default Re: How do I test the fuel shut off solenoid?

Many of these now days have a duplex plug and one wire is a ground. Get a shock from 12 V DC??

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Old 12-20-2010, 11:17 AM   post #8 of 20
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Default Re: How do I test the fuel shut off solenoid?

Quote:
Originally Posted by Walt 2002 View Post
Get a shock from 12 V DC??

Walt Conner
The coil of wire in the solenoid acts just like an ignition coil - when you break the connection, it produces a voltage spike, one you can definitely feel. There are gag items that give the "victim" a jolt, and they run on 3 volt batteries. So yes, it's quite possible to get a jolt from low voltage DC.
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Old 12-20-2010, 07:46 PM   post #9 of 20
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Default Re: How do I test the fuel shut off solenoid?

Just put your hand on it without removing it turn ign on and off you will feel it function.

Why do you want to test it ??

W
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Old 12-21-2010, 08:35 PM   post #10 of 20
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Default Re: How do I test the fuel shut off solenoid?

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Originally Posted by wilber View Post
Why do you want to test it ??

W
Cause my tractor won't go. And the snow is piling up.

I've confirmed spark, I have confirmed air, and I have confirmed fuel - as far as the fuel pump. This looks like the reason my baby won't go. If I put fuel directly into the carb, the engine will run until that fuel is used up.

I am trying to figure out if the solenoid is shot, or if something in the carb is stuck. (Hope it is just something sticky, as I hear these parts cost a pretty penny).

Thanks
Bill
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Old 12-21-2010, 08:52 PM   post #11 of 20
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Default Re: How do I test the fuel shut off solenoid?

You can replace that solenoid with a bolt. There is a thread around here somewhere that gives the size. It's a hardware store item, nothing special. You might even have one on hand, although I think it's a fine thread.
Worst that can happen is it will afterfire when you shut it down.
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Old 12-21-2010, 09:54 PM   post #12 of 20
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Default Re: How do I test the fuel shut off solenoid?

If the solenoid is no good then take some side cutters and cut off the plunger and screw the thing back into the carb. Don't hook the wire back up, tape it somewhere out of the way if you decide to replace the solenoid in the future.
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Old 12-23-2010, 06:32 AM   post #13 of 20
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Default Re: How do I test the fuel shut off solenoid?

There are also some diodes in the wire harness that can cause some grief...Ill try to find a pic and get back to you...
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Old 12-26-2010, 01:19 PM   post #14 of 20
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Default Video Test of Fuel Solenoid

This out to clear up any misunderstandings. Please not that this is a Kawasaki Fuel Solenoid that needs to be PRELOADED when testing.

http://www.youtube.com/watch?v=2n8xfcnqy9U



(See Eugene...you thought I was asleep at Kawasaki school last month!)
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Old 12-26-2010, 10:38 PM   post #15 of 20
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Default Re: How do I test the fuel shut off solenoid?

Does kawi work opposite? on briggs the plunger would be extended and applying current draws it down. He is pushing it down and then current is pushing it out.
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